.\" $NetBSD: btowc.3,v 1.4 2004/01/24 16:58:54 wiz Exp $
.\"
.\" Copyright (c)2003 Citrus Project,
.\" All rights reserved.
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.Dd March 3, 2003
.Dt BTOWC 3
.Os
.\" ----------------------------------------------------------------------
.Sh NAME
.Nm btowc
.Nd convert a single byte character to a wide character
.\" ----------------------------------------------------------------------
.Sh LIBRARY
.Lb libc
.\" ----------------------------------------------------------------------
.Sh SYNOPSIS
.In wchar.h
.Ft wint_t
.Fn btowc "int c"
.\" ----------------------------------------------------------------------
.Sh DESCRIPTION
The
.Fn btowc
function converts a single byte character
.Fa c
in the initial shift state of the current locale to a corresponding
wide character.
.Pp
The behaviour of
.Fn btowc
is affected by the
.Dv LC_CTYPE
category of the current locale.
.\" ----------------------------------------------------------------------
.Sh RETURN VALUES
The
.Fn btowc
function returns:
.Bl -tag -width 012345678901
.It Dv WEOF
If
.Fa c
is
.Dv EOF
or if (unsigned char)
.Fa c
does not correspond to a valid single byte character representation.
.It (otherwise)
A wide character corresponding to
.Fa c .
.El
.\" ----------------------------------------------------------------------
.Sh ERRORS
No errors are defined.
.\" ----------------------------------------------------------------------
.Sh SEE ALSO
.Xr mbrtowc 3 ,
.Xr setlocale 3 ,
.Xr wctob 3
.\" ----------------------------------------------------------------------
.Sh STANDARDS
The
.Fn btowc
function conforms to
.St -isoC-amd1 .
